Hainan Engineering Research Center of Aquatic Resources Efficient Utilization in South China Sea, Hainan University, Hainan 570228, China; College of Food Science and Technology, Hainan University, Hainan 570228, China.
Hainan Engineering Research Center of Aquatic Resources Efficient Utilization in South China Sea, Hainan University, Hainan 570228, China; Key Laboratory of Food Nutrition and Functional Food of Hainan Province, Haikou 570228, China; Engineering Research Center of Utilization of Tropical Polysaccharide Resources, Ministry of Education, Haikou 570228, China; College of Food Science and Technology, Hainan University, Hainan 570228, China.
Food Chem. 2021 Jun 15;347:129043. doi: 10.1016/j.foodchem.2021.129043. Epub 2021 Jan 9.
In this study, the properties difference of Tilapia (Oreochromis Niloticus) skin collagen peptide chelate zinc prepared by zinc sulfate (P-Zn-S) and zinc lactate (P-Zn-L) were investigated. The results indicated that compared with P-Zn-L, P-Zn-S exhibited higher Zn-chelating capacity and different structural morphology, which may closely relate to the composition amino acid of Asp, Glu, His, Lys, Arg, Cys and Pro. FTIR and UV-Vis analysis indicated that different zinc sources could influence the metal ligands and the types of amino acid residues which were involved in chelation reaction. P-Zn-L exhibited better zinc solubility and had higher dialyzable zinc than P-Zn-S, indicating that P-Zn-L had better zinc bioaccessibility. These results suggested that P-Zn-L with a granular structure could reduced gastric stability, promoted intestinal release, and was beneficial to zinc absorption, which can be used as dietary zinc carriers.
在这项研究中，我们研究了由硫酸锌（P-Zn-S）和乳酸锌（P-Zn-L）制备的罗非鱼（Oreochromis niloticus）皮胶原蛋白肽锌配合物的性质差异。结果表明，与 P-Zn-L 相比，P-Zn-S 具有更高的锌螯合能力和不同的结构形态，这可能与 Asp、Glu、His、Lys、Arg、Cys 和 Pro 等组成氨基酸密切相关。傅里叶变换红外光谱（FTIR）和紫外可见光谱（UV-Vis）分析表明，不同的锌源可能会影响参与螯合反应的金属配体和氨基酸残基类型。P-Zn-L 具有更好的锌溶解度，可透析锌含量高于 P-Zn-S，表明 P-Zn-L 具有更好的锌生物利用度。这些结果表明，具有颗粒状结构的 P-Zn-L 可以降低胃稳定性，促进肠道释放，有利于锌的吸收，可作为膳食锌载体。
